In this video I compare the John Deere Number 5 and Number 38 sickle mowers, as well as a few of the difference between a 1948 and 1951 John Deere Model A tractors.
I reference the 48 as a 47, as this tractor was the first one that we got running, and at the time I didn't know as much about the model A lineup. At the time, the information I found on the SN listed it as a 47 (which I believe which was tractordata, but it shows it correct now), but I later found it to be a 48 model year, but manufactured in July of 47.
Anyway, I apologize for any errors. I'm not an expert, but only draw on what I've seen and learned over the years, so please forgive any technical errors I may have said being off script.
Also seen in the video, but not mentioned, is a John Deere BW and John Deere 5020.